package org.example.filter;

import jakarta.servlet.*;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;

@Slf4j
//@WebFilter(urlPatterns = "/*")//拦截所有请求
public class DemoFilter implements Filter {

    //初始化方法，web服务器启动的时候执行，只执行一次
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        log.info("DemoFilter init");
        Filter.super.init(filterConfig);
    }

    //拦截到请求之后，执行，会执行多次
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        log.info("拦截请求。。。。。。");
        //放行
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {
        log.info("DemoFilter destroy");
        Filter.super.destroy();
    }
}
